Toothbrush



FIG. 1 is a perspective view as seen from the top, right side and front end of a toothbrush showing my new design;

FIG. 2 is a rear end elevational view thereof;

FIG. 3 is a front end elevational view thereof;

FIG. 4 is a reduced left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a toothbrush, as shown. 